v0.12.4

What's Changed

• chore: cleanup unit tests and add test for options.signSourceCallback by @jdalton in #414
• chore: add files required for open source by @garychangsf in #416
• build(deps): bump http-cache-semantics from 4.1.0 to 4.1.1 by @dependabot in #415
• fix: ensure red callable functions have undefined 'this' context by @jdalton in #417
• fix: @W-12489598 detect minification from function name and not comment removal by @jdalton in #419

Full Changelog: v0.12.3...v0.12.4